The Honda 78102-YG4-000 Casing Cover is a genuine OEM replacement designed for the WB30 and WD30 water pumps. As a factory-original component, this part is manufactured to Honda's exact specifications, ensuring a correct fit with no guesswork. It is compatible with WB30 and WD30 water pumps — confirm your pump's serial number against the fitment table to ensure this is the right cover for your unit.
Key Features
- Genuine OEM Construction — factory-original Honda part that replicates the original casing cover's dimensions and form, keeping the pump casing properly enclosed and sealed
- Direct OEM Replacement — engineered to swap in place of the original cover on WB30 and WD30 water pumps without modification
- Serial Number Verification Advised — Honda updates parts at production serial breaks, so check your pump's serial number against the fitment table before ordering to confirm this is the correct supersession for your unit
- Protects Pump Internals — a damaged or missing casing cover exposes the internal components of the pump to debris, moisture, and physical damage, accelerating wear and compromising pump output
The casing cover encloses the outer housing of the water pump, protecting the internal volute, impeller, and associated components from external damage and contamination. It forms part of the structural shell that keeps the pump's working parts aligned and shielded during operation. When the casing cover is cracked, broken, or missing, the pump becomes vulnerable to debris ingestion and mechanical damage, reducing flow performance and potentially causing premature failure of internal components.
Part Details
| Part Number | 78102-YG4-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Casing Cover |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB30, WD30 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
